hirosi SBM · Public domain
About
This notable hybrid, *Nepenthes xtrusmadiensis*, is a natural cross between *N. lowii* and *N. macrophylla*, restricted to the summit ridge of Mount Trus Madi. Its pitchers are among the largest of any Bornean species, exhibiting a striking intermediate form between its parent plants.
Field notes
Morphology
The plant has petiolate leaves that can measure up to 50 cm in length. The pitchers are large, reaching 35 cm in height, and are roughly intermediate in form between the parent species. The lid is held away from the mouth like *N. lowii* and bears short bristles on its lower surface, while the peristome features prominent ribs and teeth, though less developed than that of *N. macrophylla*. The inflorescence can reach up to 50 cm long and has two-flowered pedicels.
Distribution & habitat
Restricted to the summit ridge of Mount Trus Madi, found at elevations between 2,500 and 2,600 m (8,200 to 8,500 ft) above sea level.
History & etymology
Discovered by Johannes Marabini and John Briggs in 1983 and described the same year by Marabini. Briggs noted the sheer size of the pitchers upon discovery, suggesting a hybrid nature.
Habitat
- Altitude
- 2,200–2,600 m
- Altitude Class
- highland
Cultivation
- Difficulty
- intermediate
- Temperature
- Day 18–25°C / Night 10–18°C
- Humidity
- 70–95%
Crossed N. × trusmadiensis with another species?
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